#u2 {
    position: absolute;
    left: 90px;
    top: 6px;
    width: 304px;
    height: 240px;
}
.ax_image {
    font-weight: 400;
    font-style: normal;
    font-size: 13px;
    color: #000000;
    text-align: center;
    line-height: normal;
}
.span4{
    width: 30%;
    height: 240px;
}
#z{
    width: 60%;
    height: 340px;
    background-color: #d5d5d5;
    margin:50px 100px;
    text-align: center
}
#u4 {
    position: absolute;
    left: 830px;
    top: 115px;
    width: 100px;
    height: 25px;
}